I am looking for stairway to Power BI kind of articles. I have read few articles in simple-talk although it explains about some specific areas.

So look in the "Stairways" selection in the vertical menu on the left of your screen. There's one on "Stairway to DAX and Power BI"

--Jeff ModenRBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.First step towards the paradigm shift of writing Set Based code: Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair